Table 2.
Descriptive characteristics of lifetime residential history for breast cancer cases and controls: WEB Study, 1996–2001;
| Erie and Niagara (n = 15487) | Outside (n = 4752) | Total (n = 20240) | ||||
| Case | Control | Case | Control | Case | Control | |
| Premenopausal | ||||||
| Total numbers of residences in lifetime | 1661 | 2767 | 432 | 948 | 2093 | 3715 |
| Average numbers of residences per participant | 5.8 | 4.9 | 3.2 | 3.4 | 5.0 | 4.4 |
| Average years in each residence* (Mean ± SD) | 5.6 ± 6.0 | 6.2 ± 6.6 | 4.3 ± 5.4 | 3.9 ± 4.9 | 5.3 ± 5.9 | 5.5 ± 6.3 |
| Postmenopausal | ||||||
| Total numbers of residences in lifetime | 4217 | 6842 | 1290 | 2082 | 5508 | 8924 |
| Average numbers of residences per participants | 5.4 | 5.0 | 3.5 | 3.2 | 4.8 | 4.4 |
| Average years in each residence* (Mean ± SD) | 6.9 ± 7.3 | 7.3 ± 7.9 | 4.8 ± 5.6 | 5.2 ± 6.3 | 6.3 ± 7.0 | 6.7 ± 7.6 |
* Excludes residences with missing data for length of residence.